Questions on test answered by real tutors!

Tutors Answer Your Questions about test (FREE)

Question 318930: find three positive numbers whose sum is 32 and p =xy^2z is a maximum
Click here to see answer by Fombitz(32388)

Question 319038: A chemist has 10% and 16% acid solutions. How many liters of each solution are needed to produce 30 liters of a 14% acid solution?
Click here to see answer by Fombitz(32388)

Question 319036: How many ounces of a silver alloy costing $4 an ounce must be added to 10 ounces of an alloy costing $6 an ounce to produce an alloy that costs $4.32 per ounce? Complete the box and write the equation that would allow you to solve for the $4 amount (x). Solve for (x).
Click here to see answer by Fombitz(32388)

Question 319086: A box contains a radioactive substance. The number of kilograms r(t) at time t years is given by the formula r(t) = 2^-0.002149t. How long will it take until only one-half kilogram of the radioactive substance is left in the box?
Click here to see answer by Fombitz(32388)

Question 319091: If x = yz, find the value for x given that y = 2 and z = 5
Click here to see answer by Edwin McCravy(20054)

Question 319116: 6e^4x - 5 = 24
Click here to see answer by Fombitz(32388)

Question 319113: 1/5 log (x + 4) -1 = 0
Click here to see answer by Fombitz(32388)

Question 319126: 5x + 3 =
Click here to see answer by Fombitz(32388)

Question 319140: A certain radioactive isotope has a half-life of approximately 1700 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 25% of that amount?
Click here to see answer by scott8148(6628)

Question 319157: Your question goes here. Write clearly! We are not mind readers, so be sure to ask a question that we can understand.
Click here to see answer by nyc_function(2741)

Question 319108: The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke^0.05t where k is a constant and t is the time in years. If the current population is 36,000, in how many years is the population expected to be 90,000? (Round to the nearest year.)
Click here to see answer by nyc_function(2741)

Question 319156: A lake is stocked with 496 fish of a new variety. The size of the lake, the availability of food, and the number of other fish restrict growth in the lake to a limiting value of 3100.The population of fish in the lake after time t, in months, is given by the function, P(t) =3100/1 + 5.7e^-0.28t. After how many months will the population be 1289?
Click here to see answer by nyc_function(2741)

Question 319158: A dish of lasagna baked at 375�F is taken out of the oven into a kitchen that is 74�F. After 6 minutes, the temperature of the lasagna is 319.5�F. What will its temperature be 20 minutes after it was taken out of the oven? Round your answer to the nearest degree.
Click here to see answer by nyc_function(2741)

Question 319284: simplify radical 40 X^12y^9

Click here to see answer by stanbon(75887)

Question 319316: 2x^2-3x+7=0 what is x???
Click here to see answer by nyc_function(2741)

Question 319312: A person invests $8000 for one year. Part of this amount is invested at 2.65% simple interest and the rest is invested at 3.12% simple interest. If the total interest received from both investments is $235.50, find the amounts invested at each rate
Click here to see answer by stanbon(75887)

Question 319417: (6x+8)+(4x-1)
Click here to see answer by checkley77(12844)

Question 319487: cos 35 degree/sin 35 degree + sin 11 degree/cos 79 degree - cos 28 degree cosec 62 degree
Click here to see answer by Alan3354(69443)

Question 319484: Solve when 0 degree < 0(theta)<90 degree cos 0(theta)/1-sin 0(theta) + cos 0(theta)/1+sin 0(theta)
Click here to see answer by Alan3354(69443)

Question 319699: 1. fran swims at a speed of 2.2 km/h in still water. the lazy river flows at a speed of 0.6 km/h. how long will it take fran to swim 0.8 km upstream?
2. find the union.
{5,9,11}[union]with the o with slash in the middle
3. a hospital parking lot charges $2.00 for the first hour or part thereof, and $1.00 for each additional hour or part thereof. A weekly pass cost $43.00 and allows unlimited parking for 7 days. if each visit jonny makes to the hospital lasts one and a half hours, what is the minimum number of visits that would make it worthwhile to buy a pass?
4. bayside insurance offers two health plans. under plan a, giselle would have to pay the first 70% of her medical bills, plus 40% of the rest. under plan b, giselle would pay the first $230, but only 25% of the rest. for what amount of medical bills will plan b save giselle money? assume she has over $230 in bills.
Click here to see answer by mananth(16946)

Question 319949: The owner of Nuts2U Snack Shack mixes cashews worth $6.25 a pound with peanuts
worth $2.00 a pound to get a half-pound mixed nut bag worth $1.70. How much of each kind of nut is included in the mixed bag?
Click here to see answer by stanbon(75887)

Question 320266: John got 35 questions correct out of 40 questions on a math test. Approximately what percent of the questions did john get correct
Click here to see answer by rfer(16322)

Question 320341: Can you show me how to solve this septic equation? There should be 7 values for x.
x^7 - 35x^6 + 507x^5 - 3921x^4 + 17388x^3 - 43956x^2 + 58352x - 31360 = 0
Thank you,
John
Click here to see answer by Fombitz(32388)

Question 320340: Sketch the graph of the circle x^2+(y-2)^2=25. Find the circumference and the area of the circle.
Click here to see answer by Fombitz(32388)

Question 320550: can someone explain to me the meaning n+1 or n-1 in Inductive reasoning?
Click here to see answer by solver91311(24713)

Question 320575: Hi!
I am seeking to send my kids, 11,10 and 7 a problem a day. Do you know a good resource for this type of instruction?
Click here to see answer by Edwin McCravy(20054)

Question 320879: which of the sequence are arithmetic which are geometric and which are neither
1,3,5,7,9
3,6,12,24,48
9,13,17,21,25,29
1,8,27,64,125
Click here to see answer by stanbon(75887)

Question 320864: help me with writting an essay
Click here to see answer by Fombitz(32388)

Question 320877: convert 5284 into base2
Click here to see answer by Fombitz(32388)

Question 320967: Factor by grouping: 2x^3+8x^2-7x-28
Click here to see answer by Sunny Day(15)

Question 320963:
Click here to see answer by Fombitz(32388)

Question 320993: Solve for y
2y-3=7
Click here to see answer by rfer(16322)

Question 320990: 2y-3=7
Click here to see answer by rfer(16322)

Question 320978: Solve using appropriate properties and state the property
3/4*1/2+6/7-2/3*3/4+7/10 =?
Plz send me answer
Click here to see answer by rfer(16322)

Question 321237: 12x squared divided by 3x to the fourth power
Click here to see answer by checkley77(12844)

Question 321302: The instructor of an introductory computer course wants to make a wall chart of a computer desktop for her students. To make it as realistic as possible she would like the desktop icons to be proportional to the size of her 6 foot x 6 foot chart. If the icons in her PC screen are 3/8 inch x 3/8 inches what should the dimensions of the icons be on the wall chart?
I am not sure of the equation for this. I have been using 3/8=x/72 bur I keep getting 3/8 for an answer and I know that is incorrect. Please help me with the equation.
Click here to see answer by solver91311(24713)

Question 321401: 2[x-(2-3x)-4=x-5
Click here to see answer by checkley77(12844)

Question 321451: Bobby can exert a force of 190 Ib. How heavy a rock can he lift if he uses a bar that is 6 feet long and places the fulcrum so that it is 9 inches from the rock?
Click here to see answer by checkley77(12844)

Question 321470: 2a/3= 8+4a what is a
Click here to see answer by Alan3354(69443)

Question 321594: 2x+3y=41
Click here to see answer by unlockmath(1688)

Question 321656: Solve the equation.
5+2/5-x+4
Click here to see answer by stanbon(75887)

Question 321675: What is the slope of the line for the equation x = 2
Click here to see answer by Fombitz(32388)

Question 321701: Solve the absolute value
|x|=-5
Click here to see answer by solver91311(24713)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650